Amazon Self-preferencing in the Shadow of the Digital Markets Act / Joel Waldfogel.

Author
Waldfogel, Joel [Browse]
Format
Book
Language
English
Published/​Created
Cambridge, Mass. National Bureau of Economic Research 2024.
Description
1 online resource: illustrations (black and white);

Available Online

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Related name
Series
  • Working Paper Series (National Bureau of Economic Research) no. w32299. [More in this series]
  • NBER working paper series no. w32299
Summary note
Regulators around the world are discussing, or taking action to limit, self-preferencing by large platforms. This paper explores Amazon's search rankings of its own products as the European Union's Digital Markets Act (DMA) was coming into effect. Using data on over 8 million Amazon search results at 22 Amazon domains in the US, Europe, and elsewhere, I document three things. First, conditional on rudimentary product characteristics, Amazon's own products receive search ranks that are 24 positions better on average throughout the sample period. Second, the Amazon rank differential is large in comparison with the differential for 142 other popular brands. Third, shortly after the EU designated Amazon a "gatekeeper" platform in September 2023, the Amazon rank differential fell from a 30 position advantage to a 20 position advantage, while other major brands' rank positions were unaffected. The changed Amazon search rankings appear in both Europe and other jurisdictions.
Notes
April 2024.
Source of description
Print version record
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